# SemrushBot

> Semrush's backlink and keyword crawler. It is not an AI crawler, but it is usually in the top three by volume on any site, and it is the cheapest block on this list.

| field | value |
|---|---|
| operator | Semrush |
| category | SEO and backlink crawlers |
| robots.txt token | `SemrushBot` |
| user-agent contains | `SemrushBot` |
| robots.txt | obeys robots.txt (documented) |
| verify by | reverse DNS |
| published IP ranges | none published |
| prefixes mirrored | 0 IPv4 / 0 IPv6 |
| operator docs | https://www.semrush.com/bot/ |
| last reviewed | 2026-09-01 |

## What blocking it costs you

Your competitors' Semrush reports get thinner, and so do yours. No user-facing effect.

## Full user-agent string

```
Mozilla/5.0 (compatible; SemrushBot/7~bl; +http://www.semrush.com/bot.html)
```

## Block it

```
User-agent: SemrushBot
Disallow: /
```

## Allow it

```
User-agent: SemrushBot
Allow: /
```

JSON: https://www.pathwren.workers.dev/crawler/semrushbot.json · index: https://www.pathwren.workers.dev/llms.txt